Internal-combustion engine.



S. G. BARGERY.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED SEPT- 30. m5.

Patented Sept. 12, 1916.

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h Suva/whom Samurai Qfiaryzy SAMUEL G. BARGERY, 0F DETROIT, MICHIGAN.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented Sept. 12, 1916.

Application filed September 30, 1915. Serial No. 53,438.

The invention comprises various features of construction as hereinafterset forth.

In the drawings: Flgure 1 1s a central longitudinal section through theengine; and

Fig. 2 is a cross section thereof.

A is a casing having opposite alined cylindrical portions B and Cconnected by an intermediate portion D.

E is a hollow piston bridging the intermediate portion D and engagingand reciprocating in the opposite cylinders 13 and O.

F is a rotary cam Within the piston E, which is mounted upon a shaft Gextending outward through one end of said piston and cylinder andproviding suflicient clearance for the free reciprocation of the piston.

To convert the reciprocatory movement of the piston into rotary movementof the cam F, the latter is provided with a cycloidal endless groove Hwhich is engaged at diametrically opposite points by roller bearings Iand I mounted on the piston. The piston is also provided with externalroller bearings .l which engage longitudinal grooved guides K formed inthe intermediate portion D of the casing, the arrangement being suchthat the piston is compelled to travel in a rectilinear path by theguides K, while the engagement of the rollers I with the groove H willcommunicate a rotary movement to the cam F.

The rolls I and J are preferably connected to a common pivot member Lwhich passes through a removable bearing M engaging a threaded aperturein the walls of the piston E. The piston is provided with rings N orother means of forming a tight connection with the cylinders B and C,and a ring or packing O engaging a sleeve bearing P in which the shaft Gis journaled. Endwise movement of the shaft G and cam member F isprevented by suitable thrust ized as a two-cycle gas engine.

bearings, and as shown one of these is formed by the cam and the otherby a collar Q on the shaft G.

lVith the construction as thus far described, it is evident that thealternate introduction and exhaustion of a suitable motive fluid in thecylinders B and C will impart reciprocating IHOVQHIGlli) to the piston,which through the mechanism described will convert this movement intorotary movement of the cam F and shaft G. Preferably the motive power isdeveloped by internal combustion, and as shown the engine is organ- Theexplosive charge is introduced through an inlet valve B- into thecylinder C during the outward stroke of the piston and is compressedupon the return stroke, until a transfer port S leading from thecylinder C to the cylinder B is opened by the movement of the piston inthe latter cylinder. This will admit the compressed gaseous charge tothe cylinder B, where it will expel the products of a previous explosionthrough an exhaust port T, as is usual in two-cycle engines. Thecylinder B is preferably water-jacketed as indicated at U, and

a spark-plug V is provided for ignition.

In order to equalize the volumes of the two cylindersB and C and toexpose equal piston areas therein the cylinder C is of slightly greaterdiameter than the cylinder 13, so as to compensate for the cross sectionof the shaft G and sleeve bearing P.

What I claim as my invention is 1. In an engine, the combination with acasing having aXially-alined opposed cylindrical portions and anintermediate portion of greater diameter than said cylindrical portionshaving longitudinally-extending guides, of a hollow piston bridging saidintermediate portion and reciprocating in said cylindrical portions, arotary cam within said hollow piston, ashaft on which said cam ismounted extending out through one end of said piston and cylinder,thrust bearings for holding said shaft from endwise movement, and meansmounted on said piston cooperating with said rotary cam and saidlongitudinal guides for converting the reciprocatory motion of thepiston into r0- tary motion of the cam.

2. In an engine, the combination with a casing having axially-alinedopposed cylinder portions and an intermediate connecting portionproviding longitudinal guides,

of a hollow piston bridging said intermediate portion andreciprocatingly engaging saidcylinder portions, a rotary cam within saidhollow cylinder, a shaft on which said cam is mounted passing outwardaxially of said piston and cylinder, a thrust bearing for preventingendwise movement of said cam and shaft, and diametrically opposedmembers upon said hollow piston extending inward and outward therefromrespectively engaging said cam and said longitudinal guides to convertthe reciprocatory motion of the piston into rotary movement of the cam.

3. An engine, comprising a casing having opposed axially-alined cylinderportions and an intermediate portion providing Ion--gitudinally-extending guides,a hollow pie-- ton bridging saidintermediate portion and reciprocatingly engaging said cylinder portions, a rotary cam within said hollow cylinder, a shaft on which saidrotary cam is mounted passing axially out through said piston andcylinder, means for preventing endwise movement of said cam, bearingsonv said piston member respectively engaging said rotary cam andlongitudinal guides, and means for introducing a gaseous charge in oneof said cylinders and for transferring said charge, compressing andexploding the same in the opposite cylinder. l 4. An engine, comprisinga casing having aXially-alined opposed cylinder portions and anintermediate connecting portion providing longitudinally-extendingguides, a hollow piston bridging said intermediate portion andreciprocatingly engaging said cylinder portions, said intermediateportion being spaced from said piston, a rotary cam within said hollowpiston, a shaft on which said'camis mounted passing axially out throughsaid piston and cylinder, means mounted on said piston cooperating withsaid guides and cam forconverting the re ciprocatory movement of saidpiste into rotary movement of said cam and shaft, and means forutilizing said opposite cylinder portions for the compression andexplosion of a gaseous charge to reciprocate said piston.

In testimony whereof I affix my signature in presence of two witnesses.

SAMUEL G. BARGERY.

Witnesses:

JAMES P. BARRY,

PHYLLIS CoBURN,

